Change the first gen RX7 mechanical alternator regulator to a electronic one. It will give you a better responding regulator and it fits in the original box.
Test version
After some research and tweaking I had the test version ready: Testing in the car: Ordered some small pcb's:
Final design
Black: IGN+
Black/Yellow: N
Brown: S
White: GND
Yellow/Green: Light
White/Black: F
White/Red: ACCU (not connected)
Ordered some big pcb's:
After road testing it for almost 4 years it was time to assemble it on a big pcb and mount it
Update: 31/10/2017
got a small issue with the big pcb, sometimes the alternator warning light comes up even when the Voltage is good. Currently I'm trying to solve it but can't find it.
Latest changes
15-10-2017: uploaded the pictures to the site
26-02-2017: Added to the site